Mining apparatus



9, 1935., C. F. osGooD MINING APPARATUS original Filed oct. 1v, 1930 4 Sheets-Sheet .www r'l i935.. C, 1F, OSGQOD W l MINING 'APPARATUS Original Filed Oct. 17, 1930 4 Sheets-Sheet. 3

z3 49 4342 f5 NZ 77 f4 192i W 15 My s, M5., c. F. osGooD MINING APPARATUS Original Filed Oct. 1'7, 1930 4Sheets-Sheet 4 Patented July 9, 1935 attriti MINING APPARATUS Charles F. Osgood, Claremont, N. H., assigner to Sullivan Machinery Company, a corporation of Massachusetts Application October 17,

1930,` Serial No. 489,383

f Renewed June 16, 1933 1,05 Claims.

This invention relates to mining apparatus and more particularly has reference to improvements in the adjustable supporting structure for the cutting appliances of an apparatus for mining coal.

An object of this invention is to provide an improved coal mining apparatus. Another object is to provide an improved adjustable supporting structure for the cutting appliances of such an apparatus. A further object is to provide an improved adjustable supporting structure for the cutting appliances of such an apparatus whereby kerfs may be cut in the coal in any desired horizontal plane between the mine roof and mine fioor. Another object is to provide an improved coal mining apparatus of the so-called combined horizontal and shear cutter type. object is to provide an improved revoluble supporting structure for the cutting appliances of a coal mining apparatus whereby kerfs may be cut in the coal in either horizontal or vertical planes and including an adjustable supporting structure whereby the cutting appliances may be positioned to cut inrparallel planes in any operatingrposition of the cutting appliances. A iurther object is to provide in an apparatus of the character set forth an improved adjustable supporting structure for the cutting appliances whereby the latter may be adjusted into parallel horizontal planes and parallel vertical planes while the same are maintained at all times parallel to `the longitudinal axis of the apparatus and having associated therewith improved means for tilting the cutting appliances to change their angle in altitude. These and other objects of this invention will, however, hereinafter more fully appear.

In the accompanying drawings there is shown for purposes of illustration one form and a modiiication thereof which the invention may assume in practice.4

In these drawings,-

Fig. l is a side elevational view of a coal minin apparatus having embodied therein an illustrative form of the improved adjustable supporting structure for the cutting appliances, parts being shown in vertical section to illustrate structural details.A

Fig. 2 is a plan view of the apparatus shown in in Fig. 1. i y

Fig. 3 is a horizontal sectional view taken substantially on line 3 3 of Fig.1.

'50 Fig. 4 is a vertical sectional view taken substantially on line 4,-6 of Fig. 2.

Fig. 5 is a transverse sectionalV view taken substantially on line 5-5 of Fig. Il.

Fig. 6 is a vertical sectional View taken substan- 5 tially on line G-fa of Fig. 2.

Yet another (Cl. Zin-28) Fig. 7 is a plan view oi the mechanism shown iny Fig. 6, parts being shown in horizontal section to illustrate details of construction.

Fig. 8 is a detail sectional view taken substantially on line t-B oi Fig. 5.

Fig. 9 is a detail sectional View taken substantially online 9-9 of Fig. 7.

Fig'. l0 is a view similar to Fig. 3 and illustrating a modified form of construction.

Fig. 1l is a vertical sectional View taken on line ll-il of Fig. 10.

Fig. l2 is a transverse sectional view with parts shown in plan taken substantially on line lZ-lZ of Fig. ll.

Fig, 13 is a vertical sectional view taken on a plane corresponding to Fig. 6 and illustrating the forward end of the modied supporting structure.

Fig, le is a detail sectional view taken through the swinging mechanism for the cutting appliances.

In this illustrative construction there is shown a coal mining apparatus of the mounted, track cutting type generally comprising a truck frame l mounted on wheels 2 adapted to run along a mine trackway 3 and having supported on the forward end thereof the improved revoluble supporting structure generally designated l for the cutting appliances, the cutting mechanism being generally indicated at 5. Carried by the truck frame is a motor i5 which is adapted to drive through mechanism which may be generally similar to that disclosed in the patent to Oldroyd 1,466,075, the truck wheels 2 and the cutting mechanism 5, and as hereinafter described, Vthe improved adjusting mechanism for the adjustable supporting structure il. Y g

Now referring to the improved adjustable supporting structure, it will be noted that the neck structure Yis indicated at 'l and this neck structure is supported within the' forward end of the truck frame to rotate on an axis which is horilll zontal and parallel to the length of the apparatus. Said neck structure has a cylindrical neck 3 which rests in a horizontal longitudinal bearing 9 formed in an upstanding frame structure iii at theforward end oi the truck. The `mechanism for rotating the neck 8 within its bearing 9 to revolve the adjustable supporting structure d about the neck axis to vary the cutting position oi the cutting mechanism 5 may be of the same general character as that described in the patent to Oldroyd 1,456,930 and herein includes a worm wheel ll seated on the neck at the rear of the frame il! and meshing with a worm wheel I2 driven, through suitable operator-controlled connections, by the motor 6. As the specific construction of this mechanism for revolving the adjustable cutter supporting structure 4 does not per se enter into this invention, further detail description of the same is unnecessary other than to state that by rotating the worm wheel I I the entire neck structure is rotated about the neck axis.

Again referring to the improved adjustable supporting structure 4, it will be observed that formed on the neck are forwardly projecting side arms or side walls I3, I3 which are parallel to each other and parallel to and equidistant from the axial line of the neck. In each of saidY walls is a bearing I4 in alinement with the other of said bearings on a line which is perpendicular to and intersects the axial line of the neck. In said bearings Ill, lli is mounted a shaft I5. Forward of the neck structure is a single swingable supporting arm or link member I5 which constitutes the sole connection between the revoluble neck structure and the cutting mechanism 5 and having at its rear end projections ll each of which overlaps the inner face of one of the walls I3 of the neck structure as shown in Fig. 3. These projections Il' are mounted on the bearing sleeves I4, I4 carried by the side walls I3, I3 of the neck structure. The shaft I5 extends through the projections Il and side walls I3 within the bearings I 4 to form journals for the link member or arm IG, said journals being on an axial line which is perpendicular to and intersects the axial line of the neck. At its forward end the arm or link member IG has a pair of parallel projections IB, I8 each of which is in approximately the plane of the corresponding projections Il and each of these projections I8 overlaps the inner face of one of a pair of side arms or projections I 9, I9 formed on the cutter head frame 28. Supported within each of the projections I8 is a bearing sleeve ZI and mounted within these bearing sleeves is a shaft 22 parallel to the shaft I5. These bearing sleeves 2l in which the shaft 22 is supported project outwardly through the side arms I9 formed on the cutter head frame and form a pivotal mounting for the cutter head frame as hereinafter described. Pivotally mounted on the cutter head frame 2U about an axis perpendicular to the axial line of the neck is an elongated plane cutter bar 23 carrying on its margin an endless cutter bit carrying cutter chain 24, this cutter bar being swingable about its axis in planes parallel to the neck axis and in planes including the neck axis.

The driving connections between the motor 6 and the cutting mechanism herein comprise a horizontal longitudinally extending shaft 25 alined with and connected to, as by a coupling 26, the motor shaft 21. A neck shaft 23 is located in the neck on the axial line of the neck and has keyed thereto at its rear end a clutch element 28a which is connectible by a shiftable clutch element Zb to the shaft 25 as shown in Fig. 1. Fixed to the forward end of the neck shaft 28 is a bevel gear 29 meshing with and driving a bevel gear 30 loosely mounted on the shaft I5. On the arm or link member I6 are two bearings 3|, 3l which are on an axial line which intersects the axial lines of the shafts I5 and 22 and the axial line of the neck. In said bearings is journaled a transmission shaft 32 which has xed thereto at its rear end a bevel gear 33 meshing with and driven by the bevel gear 323 as shown in Fig. 3. Fixed to the forward end of the shaft 32 is a bevel gear 34 meshing with and driving a bevel gear 35 fixed to the shaft 22. Journaled within the cutter head frame 28, as shown in Fig. 6, is a shaft 36 having fixed thereto at its rear end a bevel gear 3l meshing with and driven by the bevel gear 35 (see Fig. 3). Fixed to the forward end of the shaft 36 is a bevel gear 38 meshing with a bevel gear 33 keyed to a shaft lli) suitably journaled within the cutter head frame and* arranged with its axis perpendicular to the axial line of the neck in various positions including horizontal cutting positions. Keyed to the shaft 4D at 42 is a chain sprocket 43 which engages and drives the cutter chain 24 in the manner well understood in the art. The cutter head comprises a body 44 and a cap member 45 which is suitably secured to the body. The two pairs of side arms or projections IS, i9 are formed on the body 44. The body extends forwardly and has a bearing 46 which receives one end of the shaft 4i] as shown in Fig. 6. The cap member extends forwardly and has a bearing lll' in alinement with the bearing and also receives the shaft fi. The cutter bar support i218 has a cap plate 49 which surrounds the bearing C-'I of the cap member. It will thus be seen that the cutter support is hinged to turn on the axial line of the shaft 40. A worm wheel 55 loosely surrounds the bearing 45 and rests against a supporting plate 5I and bears against the horizontal part of the support and is adapted to be engaged to the cutter support by a latch mechanism to be hereinafter described. worm wheel 53 is arranged concentric with the shaft 45 and meshing with this worm wheel is a worm 52 fixed to a transverse shaft 53. The shaft 53 is suitably journaled in bearing sleeves 54 supported within projections 54a, 501e formed integral with the side arms I9, i9. The mechanism for rotating the worm in either of opposite directions to swing the cutter bar in opposite directions about its pivot at a slow speed appropriate for cutting herein comprises a bevel gear 55 fixed to the shaft 22 and meshing with reverse bevels 55, 5l loosely journaled on an inclined shaft 58. The shaft 58 is suitably journaled within a gear housing 553LL secured to the side of the cutter head frame 2S. Splined to this shaft is a jaw clutch member 5S which is adapted to connect alternatively the reverse bevels 51 to the shaft 53. Keyed to the shaft 53 is a worm 60 meshing with a worm wheel f5! keyed to the shaft 53 (see Fig. 9) which drives the worm 52 meshing with the bar swinging worm wheel 5D. It will thus be seen that the cutter bar may be swung in its plane about its pivot and that the cutter chain may be driven irrespective of the adjustment of the supporting structure about the neck axis or the plane of operation of the cutter bar.

The latch mechanism for locking the cutter bar support to the worm wheel 5@ or for releasing the cutter bar support for free swinging movement about the axis of the shaft 4G herein comprises a latch 52 pivotally mounted at 62a on the cutter bar support. The cap plate 5I is provided with a notch 63 for receiving the latch and allows said latch to rest between two teeth of the worm wheel 59. Suitable means Gli is provided for maintaining the latch 62 in its locking position. It will thus be seen that when the latch is in its locking position as shown in Fig. 6 and the worm wheel 5D is rotated through the mechanism described above, the cutter bar is swung with the worm wheel at a slow cutting speed. When the latch 62 is swung downwardly and released from the teeth of the worm wheel and the notch 53 in the cap plate, the cutter bar is free to swing relative to the worm wheel 5E). This latch mecht will thus be seen that the I anisni may be the same as that described in the `patent to Oldroyd 1,460,076.

rlihe improved mechanism for adjusting the supporting structure l to position the cutter bar 23 into parallel' planes while maintaining the cutter bar parallel to the neck axis herein comprises worin racks or gear segments (55 formed on the projections or side walls I3, I3 of the neck structure l. Meshing with these worm racks or gear segments are parallel worms te, et keyed to parallel o?, il? suitably journaled within the arm i6 and in the present construction arranged with their axes perpendicular to the arial line of the shaft l5. Keyed to the shafts Ell, il? are wcrrn wheels lill, lit (see Fig. which mesh with worms 59, @El keyed to a transverse shaft l@ likewise suitably journaled within the arm lil. Keyed to the shaft "lli intermediate its ends is a worm wheel l' l meshing with a worm 'l loosely mounted on the transmission shaft This worm is connectible to the shaft 32 by a jaw clutch i3 having suitable shipper mechanism 'it including a transverse shaft l5 carrying at its ends operating handles 'l5 located at the opposite sides of the arm. Also formed on the projections, l l il on the cutter head frame il@ are worm racks or gear segments ll', il with which mesh worms la, le keyed to parallel shaftsfil?, le suitably journalcd within the forward end of the arm i6. Keyed to these shafts are wormwheels ed, till with which mesh forms Si, 8l keyed to a transverse shaft 82 likewise suitably journaled within the arm. H5. Fixed to this shaft intermediate its ends is a worm wheel 33 with which meshes a worm 34 loosely journaled on the shaft 32 and connectible to thek shaft by a jaw clutch 35 sirnilar to the clutch 'i3 and having similar operating mechanism including handles arranged adjacent the handles le, 'It heretofore described, From the foregoing description it will be evident that when the worms l2, lili are connected to the shait 32 and Jthe shaft 32 is connected to the motor, the worms E55, lili meshing with the worm racks and the worms 13, le meshing with the worm racks ll', ll are simultaneously driven, causing the arm l@ to be swung about the axis ci the shaft i5 in one direction while the cutter head is swung about the axis of the shaft the opposite direction, the speeds of adjustment being so proportioned that as the cutter arm and cutter head are swunI simultaneously about their respective axes, the cutter bar 23 is maintained at all times parallel to the axial line of the neck. It will be evident that when the clutch 't3 is disconnected and the clutch @E connected, the cutter head frame may be swung about the axis of the shai t 22 while the arm le remains stationary, thereby enabling the cutter bar to be tilted about an axis transverse to its length. It will also be evident that when the clutch is connected and the clutch Bti released the supporting arm may be swung about its axis while the cutter head frame remains stationary as to movement about its axis, The worins, et and lll, lil meshing with the worm racks on the neck structure and cutter head respectively, are self- Cil inthe form described above and therefore a repetition of the description ci the same is unnecessary. In this forni of the invention, instead of forming the worin gear segments Gti, @i5 and lll, 'El on the neck structure and cutter head respectively, these worm gear segments are formed on the opposite ends or" the arm Ele and are indicated at 96, 93 and 9d, di). The gear segments or racks 9e, @ti are formed on projections H33, idd formed on the rear end ci the arm. and overlap the outer faces of parallel side walls liti, lill formed on the neck structure. he worm racks or gear segments ill), 9S are formed on pro-- jections iil', lili formed on the forward end of the arm Sb? and overlap the outer' faces of projections its, ist* formed on the cutter head el. Carried by the neck structure @d are parallel worms los, lili meshing with the worin racks @il and fixed to parallel shafts l lili, l e5. Keyed to these shafts are worin wheels lilii, ist with which mesh worins lul, lill fixed to a transverse shaft suitably journaled within the frame oi the neck structure sii. Connectible to the shaft lila by a jaw clutch ide is a spur gear its meshing with an idler gear il l which in turn meshes with a spur gear il? herein formed integral with and driven by the bevel gear 3s of the cutter chain driving mechanism. Meshing with the worm racks 99, dil formed on the forward end of the arm e5 are worms H3, l is keyed to parallel shafts itil, Htl suitably iournaled within the cutter head frame. Fixed to these shafts are worm wheels (one of which is -indicated at l l in Fig. 13) and meshing with these worm wheels are worms (one of which is indicated at i i@ in Fig. 13) These worms are iixed to a transverse shaft lll" suitably iournaled within the cutter head frame. Connectible to Vthis shaft and loosely journaled thereon is a spur gear l i8 meshing with an idler gear H9 which in turn meshes with a spur gear titl herein driven by the bevel gear l'n this form of the invention the mechanism for swinging the cutter bar, generally designated lil, is substantially the as that in the form described above and includes mechanisrn for swinging the cutter bar about its pivot in either of opposite directions at a cutting speed, (see l) and le). lt will thus be seen that when the spur gears il@ and it@ are connected to their respective shafts lllii and lil the arm may be swung about the axis of the shaft l5 in one direction while the cutter head is swung simultaneously about the axis of the shaft 22, the parts being so proportioned as to maintain the cutter bar at all times in planes parallel to the axial line of the neck. Independent adjustment of the arm and cutter head may he had simply by disconnecting one or the other of the spur gears i itl and lie from its respective shaft, therehy permitting the cutter bar to be tilted out of parallelism with the neck axis about an axis transverse to the direction of its length.

vThe general mode of operation of the iinproved mining apparatus is as follows. The apparatus is propelled about the mine at a relatively high transport speed under the propulsion of the truck wheels while the truck wheels are driven at a relatively slow speed appropriate for cutting to propelthe apparatus `along the trackway to effect'surnping and withdrawal movements of the cutter bar in the manner clearly described in the Oldroyd Patent No. iflio'l. The cutter bar be adjusted in. any desired position between the mine roof and the mine floor simply by actuating the clutches to connect the worms in driving relation with the motor to eiect swinging of the supporting arm and cutter head about their respective pivots, the worm gearing effecting swinging of the supporting arm and cutter head simultaneously in opposite directions to maintain the plane of the cutter bar at all times parallel to the axial line of the neck. The cutter bar may be adjusted in any desired position about the neck axis simply by connecting the worm i2 in driving relation with the motor to cause the neck structure to be revolved in its bearing. The cutter chain may be connected in driving relation with the motor simply by connecting the clutch 28h and the cutter bar may be swung about its pivot by actuating the clutch 5S to connect one or the other of the reverse bevels 56, 5l to the shaft 58. It will thus be seen that the cutter bar may be positioned to cut horizontal kerfs in parallel planes above and below the neck axis and vertical keris in parallel planes at either side of the neck axis. As the operation of a mounted track cutter of the type disclosed herein is well known to those skilled in the art, detailed description o the various operations of the apparatus is considered unnecessary other than to state that arcwall cuts may be made at the level of the mine bottom in front of the end of the trackway, that horizontal kerfs may be cut at the level of the mine roof or in any intermediate plane between the mine roof and mine floor, and that vertical or shear cuts may be made in any position between the sides of the entry.

As a result of this invention, it will be be noted that an improved mining apparatus is provided having an improved adjustable supporting structure for the cutting appliances whereby the latter may be easily adjusted in any desired position. It will further be noted that by providing the single supporting arm or link member for the cutting mechanism and by providing the separate motor operated devices for swinging the arm about its hinge and swinging the cutter head relative to the arm it is possible to obtain an extremely ilexible and wide range of adjustment, while at the same time eliminating all complicated adjusting mechanism, it also being possible to tilt the cutter bar relative to the supporting arm at various angles to suit different cutting conditions. These and other uses and advantages of the improved mining apparatus will be clearly apparent to those skilled in the art.

While there is in this application specically described one form and a modication thereof which this invention may assume in practice, it will be understood that this form and modiiication thereof of the same is shown for purposes of illustration and that the invention may be modied and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

l. In a mining apparatus a support, kerf cutting mechanism including a pivoted cutter bar and an adjustable supporting structure intervening said support and cutting mechanism comprising but a single arm hinged to said support to swing upwardly and downwardly about an axis at right angles to the longitudinal axis of said support and on which said cutting mechanism is pivotally mounted, said arm constituting the sole supporting connection between said support and said cutting mechanism, and mechanism for swingingly adjusting said supporting structure and cutting mechanism to position said cutter bar into parallel planes while said bar is stationary as regards swinging on its own pivot and is always maintained parallel to a common straight line, said adjusting mechanism including means for swinging said arm and cutting mechanism about their pivots to move said cutter bar into aforesaid parallel planes.

2. In a mining apparatus, a wheeled truck, kerf cutting mechanism including a cutter bar support carrying a cutter bar, an adjustable supporting structure intervening said truck and cutting mechanism comprising but a single arm hinged to said truck to swing in longitudinal planes relative thereto upwardly and downwardly and on which said cutter bar support is pivotally mounted, said arm constituting the sole supporting connection between said truck and said cutting mechanism, and mechanism for simultaneously swinging said arm and cutter bar support about their respective pivots to adjust said cutter bar into parallel horizontal planes while said bar is always maintained parallel to a common straight line, and means for operating said bar to cut a horizontal plane kerf in any of aforesaid parallel planes.

3. In a mining apparatus, a wheeled truck, kerf cutting mechanism including a cutter bar support and an adjustable supporting structure intervening said truck and cutting mechanism including an arm extending longitudinally of the truck and pivotally connected to said truck and on which said cutter bar support is pivotally mounted, said arm and support being swingable about parallel axes arranged at right angles to the longitudinal axis of the apparatus to move the cutter bar into parallel planes, motor operated devices ior swinging said arm about its pivot relative to said truck, and separate motor operated devices for swinging said bar support about its pivot relative to said arm.

4. In a mining apparatus, a wheeled truck, kerf cutting mechanism including a cutter bar support and an adjustable supporting structure intervening said truck and cutting mechanism including an arm extending longitudinally of the truck and pivotally connected to said truck and on which said cutter bar support is pivotally mounted, said arm and support being swingable about parallel axes arranged at right angles to the longitudinal axis of the apparatus to move the cutter bar into parallel planes, motor operated devices for swinging said arm about its pivot relative to said truck, and separate motor operated devices for swinging said bar support about its pivot relative to said arm, said devices for swinging said cutter bar support relative to said arm being operable independently of said arm swinging devices.

5. In a mining apparatus a wheeled truck, an arm pivotally mounted on the forward end of said truck and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon to swing relative thereto, said arm and bar support being swingable about parallel axes arranged at right angles to the longitudinal axis of the apparatus, motor operated devices for swinging said arm about its pivot relative to said truck, and motor operated devices for swinging said cutter support about its pivot relative to said arm.

6. In a mining apparatus, a Wheeled truck, an arm pivotally mounted on the forward end of said truck and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on lll the outer extremity of said arm and having a cutter bar pivotally mounted thereon to swing relative theret said arm and cutter support being swingeble in longitudinally extending vertical planes relative to said truck,y motor operated devices for swinging said arm about its pivot relative to said truck, and motor operated devices for swinging said cutter support about its pivot relative to arm said devices being operable simultaneously to swing said arm and cutter bar support in opposite directions to maintain the cutter bar at all times parallel to a common straight line.

7. n a mining apparatus, a wheeled truck, an arm pivotally mounted on the forward end oi said trucli to swing in longitudinal planes relative thereto and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon, motor operated devices including internieshing gearing for vswinging said arm about its pivot relative to said truck, and motor operated devices includng intermeshing gearing for swinging said cutter bar support about its pivot relative to said. arm, said arm and said bar support being swingable about their pivots to move said cutter bar into parallel cuttingr positions in a wide range oi positions in advance oi the truck.

8; In a mining apparatus, a wheeled truck, an. arm pivotally mounted on the forward end of uck to swing in vertical planes extending longitudinally of said truck and extending ierwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon, motor operated de ices including intermeshing gearing for swinging arm about its pivot relative to said truck, and motor operated devices including interineshing gearing for swinging said cutter bar support about pivot relative to said arm, said devices being operable simultaneously to swingsaid arm and cutter bar support in opposite directions to maintain the cutter bar at all times parallel to a common straight line,

il. ln a mining apparatus, a wheeled truck, an arm pivotally mounted on the forward end or said truck to swing relative thereto about a horizontal axis extending' transversely oi the Vtruclr and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity ci said arm and having a cutter bar pivotally mounted thereon,y motor operated devices including self-locking worm gearing for swinging said arm about its, pivot relative to said truck, and motor operated devices including selilocking worm gearing ior swinging said cutter bar support about its pivot relative to said arm.

i0. in a mining apparatus, a wheeled truck, an arm pivotally mounted on the 'forward end of said truck to swing in a vertical direction relative thereto about a horizontal axis extending transversely or said truck and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon, motor operated devices including self-locking worm gearing ior swinging said arm about its pivot relative to tr-uclr, and motor operated including seit-loe ing worm gearing for invii ging said cutter bar support about its pivot relative to said arm, said devices being operable simultaneously to` swing said arm and cutter bar support in opposite directions to: maintain the cutter bar at all times parallel to a common straight line.

ll. In a mining apparatus, a wheel mounted trame, an arm pivotally mounted on the forward endof said frame to swing in longitudinal planes relative thereto and extending Vforwardly in advance oi' said frame, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon, m'otor operated devices for swinging said arm about its pivot relative to said frame including cooperating gear elements on said arm und frame, and motor operated devices for swinging said cutter bar support about its pivot relative to said arm including cooperating gear elements on said arm and cutter bar support, said arm and said bar support being swingable about their pivots to move cutter bar into parallel cutting positions.

12. In a mining apparatus, lierf cutting mechanism including a cutter bar, and an adjustable supporting structure therefor including a support revolubly mounted for rotation about a longitudinal axis, and, intervening said support andv cutting mechanism, but a single arm pivoted to swing in longitudinal planes relative to said support and on the outer extremity of which said cutting mechanism is pivotally mounted, said arm constituting the sole supporting connection between said support and said cutting mechanism, u

and mechanism for adjusting said supporting structure to move said cutter bar toward and from said longitudinal axis into parallel planes and also in an orbit about said longitudinal axis while said cutter bar is always maintained parallel. to sai-:l longitudinal axis.

i3. in a mining apparatus, kerf cutting mechanism including a cutter bar support, and an adjustable supporting structure therefor including a support revolubly mounted to turn about a longitudinal axis, and, intervening said second mentioned support and said cutting mechanism, but a single arm hinged to swing relative to said second support and on which said cutter bar support is pivotally mounted, said arm constituting the sole supporting connection between said second mentioned support and said cutting mechanism, and mechanism for simultaneously swinging said arm and said cutter bar support about their respective pivots to adjust said cutter bar through a series of parallel planes and for revolving said supporting structure about said longitudinal axis to move said cutter bar orbitally about said axis while said bar is always mainn tained parallel to said axis.

ii. ln a mining apparatus, a wheeled truck, cutting mechanism including a cutter bar support, and an adjustable supporting structure revoluoly mounted onsaid truck. about a longitudinal axis and extending between said truck and said cutting mechanism, said structure including an arm pivoted to swing in longitudinal planes relative to said truck and on the outer extremity oi' which said cutter bar support is pivotally mounted, `said arm and bar support being swingable about parallel axes to move the cutter bar toward and from said longitudinal axis into parallel cutting positions, motor operated device for swinging said arm about its pivot, and separate motor operated devices for swinging, said cutter bar support about its pivot relative to said arm.

l5. In a mining apparatus, a wheeled truck, ken? cutting mechanism including a cutter bar support, and an adjustable supporting structure revolubly lmounted on said truck about a longitudinal axis and extending between said truck and said cutting mechanism, said structure including an arm pivoted to swing' relative to said truck and on the outer extremity of which said cutter bar support is pivotally mounted, said arm and bar support being swingable about parallel axes to move the cutter bar toward and from said longitudinal axis into parallel cutting positions, motor operated devices for swinging said arm about its pivot, and separate motor operated devices for swinging said cutter bar support about its pivot relative to said arm, said devices for swinging said cutter bar support being operable independently of said arm swinging devices,

16. In a mining apparatus, a wheeled truck, a frame mounted on said truck for rotation about a longitudinal axis, an arm pivotally mounted on said frame to swing relative thereto about an axis at right angles to the frame axis and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon, said arm constituting the sole supporting connection between said rotatable frame and said bar support, devices for rota ng said frame relative to said truck to adjust said arm about said longitudinal axis, devices for swinging said arm about its pivot relative to said frame` and devices for swinging said cutter bar support about its pivot relative to said arm.

17. In a mining apparatus, a wheeled truck, a frame mounted on said truck for rotation about a longitudinal axis, an arm pivotally mounted on said frame tc swing relative thereto about an axis at right angles to the frame axis and extending forwardly in advance of said truck, a ctitf.' bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon said arm constituting the sole supporting connection between said rotatable frame and said bar support, devices for rotating said frame relative to said truck to adjust said arm about said longitudinal axis, devices for swinging said arm about its pivot relative to said frame, and devices for swinging said cutter bar support about its pivot relative to said arm, said arm swinging and support swinging devices being operable simultaneously to snr/ing; said arm and support in opposite directions to maintain said cutter bar at all times parallel to the axis of said frame.

i8. In a mining apparatus, a wheeled truck, an arm pivotally mounted on the forward end of said truck and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon, said arm and bar support being swingable about their respective axes in vertical planes extending longitudinally of said truck, motor operated devices for swinging said arm about its pivot including a rack carried at the rear end of said arm and a gear meshing with said rack, and motor operated devices for swinging said cutter bar support about its pivot relative to said arm including a rack carried on the forward end of said arm, and a gear meshing with said rack.

19. In a mining apparatus, a wheeled truck, a

Y single arm pivotally mounted on the forward end of said truck to swing in longitudinal planes relative thereto and extending forwardly in advance of said truck, a cutter bar support pivotally mounted on the outer extremity of said arm and having a cutter bar pivotally mounted thereon,

said arm constituting the sole support between said truck and said cutter bar support, and motor operated devices for swinging said arm about its pivot and for swinging said bar support relative to said arm to move the cutter bar into parallel planes while the cutter bar is always maintained parallel to a common straight iine.

20. In a mining apparatus, a Wheeled truck, an arm pivotally mounted on the forward end of said truck, kerf cutting mechanism supported at the forward end of said arm and including a forwardly projecting horizontal kerf cutter, and devices carried by said arm for swinging' said arm about its pivot to adjmt said cutter bar into parallel planes while said cutter bar is maintained always parallel to a horizontal plane.

21. In a mining apparatus, a support, kerf cutting mechanism including a cutter bar, an adjustable supporting means between said support and said cutting mechanism including a supporting structure pivotally mounted on said support to swing in longitudinal planes relative thereto, a cutter bar support pivotally mounted on the outer extremity of said supporting structure for swinging movement about an axis parallel to the supporting structure axis, said supporting structure and said bar support being swingable about their respective axes to move said cutter bar into parallel cutting positions, motor operated devices for swinging said supporting structure about its axis relative to said support, and separate motor operated devices for swinging said cutter bar support relative to said supporting structure while the latter remains stationary.

22. In a mining apparatus, a support, kerf cutting mechanism including a cutter bar, an adjustable supporting means between said support and said cutting mechanism including a supporting structure pivotally mounted on said support to swing in longitudinal planes relative thereto about a horizontal axis extending transversely of said support, a cutter bar support pivotally mounted on the outer extremity of said supporting structure for swinging movement about an axis parallel to the supporting structure axis, motor operated devices for swinging said supporting structure about its axis relative to said support, and separate motor operated devices for swinging said cutter bar support relative to said supporting structure while the latter remains stationary, said motor operated devices being simultaneously operable to swing said supporting structure and bar support in opposite directions about their respective axes to position said bar into parallel planes while said bar is always maintained parallel to a common straight line.

23. In a mining apparatus, a support, a frame member mounted on said support for rotation relative thereto about a longitudinal axis, kerf cutting mechanism including a cutter bar, an adjustable supporting means between said rotatable frame member and said cutting mechanism including a supporting structure pivotally mounted on said frame member, a cutter bar support pivotally mounted on the outer extremity of said supporting structure for swinging movement relative thereto about an axis parallel to the supporting structure axis, said supporting structure and said bar support being swingable about their respective axes to move said cutter bar into parallel cutting positions, motor operated devices for swinging said supporting structure about its axis relative to said support, and separate motor operated devices for swinging said cutter bar support relative to said supporting structure while ed on said rotatable support and extending forthe latter remains stationary.

24. In a mining apparatus, a support, a frame member mounted on said support for rotation relative thereto about a longitudinal axis, kerr" cutting mechanism including a cutter bar, an adjustable supporting means between said rotatable frame member and said cutting mechanism including a supporting structure pivotally mounted on said frame member, a cutter bar support pivotally mounted on the outer extremity of said supporting structure for swinging movement relative thereto about an axis parallel to the supporting structure axis, motor operated devices for swinging said supporting structure about its axis relative to said support, and separate motor operated devices for swinging said cutter bar support relative to said supporting structure while the latter remains stationary, said motor operated devices being simultaneously operable to swing said supporting structure and bar support in opposite directions about their respective axes to position said bar in parallel planes while said bar is always maintained parallel to a common straight line.

25. In mining apparatus, a portable base, kerf cutting mechanism including a cutter bar and a cutter bar support relative to which said bar is swingable, an arm pivotally mounted on the forward end of said base and on the outer extremity of which said cutter bar support is pivotally mounted for swinging movement about an axis parallel to the axis of swinging movement of said arm, a motor on said base, and devices driven by said motor including gearing and controllmg clutches carried by said arm for simultaneously swinging said arm and cutter bar support about their respective axes.

26. In a mining apparatus, a portable base, kerf cutting mechanism including a cutter bar and a cutter bar support, an arm pivotally mounted on the forward end of said base and on the outer extremity of which said cutter bar support is pivotally mounted for swinging movement about an axis parallel to the axis of swingv ing movement of said arm, a motor on said base, and devices driven by said rnotor including gearing controlling clutches carried by said arm for simultaneously swinging said arrn and cutter car support about their respective axes to position said cutter bar into parallel planes while said bar is always maintained parallel to a common straight line.

27. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a longitudinal axis, kerf cutting mechanism including a cutter bar and a cutter bar support, a single arm pivotally mounted on said rotatable support and extending forwardly in advance or" said base and on the outer extremity of which said cutter bar support is pivotally mounted for swinging movement about an parallel to the axis Iof swinging movement of said arm, said arm constituting the sole supporting connection between said rotatable support and said bar support, and mechanism for swinging said arm and cutter bar support about their respective axes to move said 'oar toward and from the of said rotatable support into parallel cutting positions.

28. In a mining apparatus, a portable base. support mounted on said base for rotation relative thereto about a longitudinal axis, kerf cutting mechanism including a cutter bar and a i cutter bar support, a single arm pivotally mountwa-rdly in advance of said base and on the outer extremity of which said cutter support is pivotally mounted for swinging movement about an axis parallel to the ci swinging movernent of said rm, said arm constituting the sole supporting connectionr between said rotatable support and said bar support, and mechanism for swinging said arrn and cutter bar support about their respective axes to position said cutter bar into parallel planes while said bar is always maintained parallel to a corrnon straight line parallel to the axis oi said rotatable support.

29. In a mining apparatus, a portable base, a support mounted on said base for rotation rela-- tive thereto about a longitudinal axis, lierf cuttinfI mechanism including a cutter bar and a cutter bar support,v a single arm pivotally mounted on said rotatable support and extending forwardly in advance of said base and on the outer extremity of which said cutter bar support is pivotally mounted for swinging movement about an axis parallel to axis or" swinging movement of said arm, said arm constituting the sole supporting connection between said rotatable port and said bar support, and mechanism for swinging said arm and cutter bar support about their respective axes to position said cutter bar into parallel planes while said bar is always maintained parallel to a common straight line parallel to the axis of said rotatable support, said bar support swinging mechanism being operable independently of said arm swinging mechanism to tilt said cutter car out of parallelism with said common straight line.

30. In a mining apparatus, a portable base, a lrerf cutter swingable relative to said base to cut a vertical keri, and adjustable supporting means on saidbase for supporting said kert cutter and adjustable to move said keri cutter into parallel vertical cutting positions between the sides of said base and including a plurality of relatively adjustable supports, one mounted on the other and rotatable relative to the base about parallel vertical axes and motor operated devices for independently rotating said supports about their respective axes, either support swingable relative to the other while the latter remains stationary as regards swinging movement about its own axis.

3l. In a mining apparatus, a portable base. a kerf cutter swingable relative to said to cut a vertical kerf, and adjustable supporting means on said base for supporting said kerf cutter and adjustable to move said kerf cutter into parallel vertical cutting positions including positions between the sides of said base and laterally beyond the sides of said base and including a plurality of relatively adjustable supports, one mounted on the other and rotatable relative to the base about parallel vertical axes and motor operated devices for independently rotating said supports 'about their respective axes, either support swingable relative to the other while the latter remains stationary as regards swinging movement about its own axis.

32. In a mining apparatus, a wheeled truck, kerf cutting mechanism including a cutter bar supp-ort and a cutter bar pivotally mounted on said support, land an adjustable supporting structure intervening said truck and said cutting mechanism including an arm pivotally connected Vto said truck and on which said cutter bar supportJ is pivotally mounted, said arm and support being swngable in longitudinal planes about parallel axes and said cutter bar being swingable relative to said bar support about an axis at right angles to a line parallel to a line parallel to the pivotal axis of said bar support, motor operated devices for swinging said arm about its pivot relative to said truck, separate motor operated devices for swinging said support about its pivot relative to said arm, and means for swinging said cutter bar relative to said bar support.

33. In a mining apparatus, a wheeled truck, kerf cutting mechanism including a cutter bar support and a cutter bar pivotally mounted on said support, and an adjustable supporting structure intervening said truck and said cutting mechanism including an arm pivotally connected to said truck and on which said cutter bar support is pivotally mounted, said arm and support being swingaole in longitudinal planes about parallel axes and said cutter bar being swingable relative to said bar support about an axis at right angles to a line parallel to a line parallel to the pivotal axis oi said bar support, motor operated devices for swinging said arm about its pivot relative to said truck, separate motor operated devices fcr swinging said support about its pivot relative to said arm, said devices for swinging said cutter bar support relative to said arm being operable independently of said arm swinging devices, and means for swinging said cutter bar relative to said bar support.

34. In a mining apparatus, keri cutting mechanism including a cutter bar, a support revolubly mounted for rotation about a longitudinal axis, and, intervening said support and cutting mechanism, but a single arm pivoted to swing relative to said support about an axis at right angles to the longitudinal axis of said support and on the outer extremity of which said cutting mechanism is pivotally mounted, said arm constituting the sole supporting connection between said support and said cutting mechanism, and mechanism for adjusting said supporting structure to move said cutter bar into parallel planes toward and from said longitudinal axis and also in an orbit about said longitudinal axis while said cutter bar is always maintained parallel to said longitudinal axis, said adjusting mechanism including means for swinging said arm about its pivot to move said cutter bar into aforesaid parallel planes.

35. In a mining apparatus, a wheeled truck, korf cutting mechanism including a cutter bar support and a cutter bar on said support, and an adjustable supporting structure revolubly mounted on said truck about a longitudinal axis and extending between said truck and said cutting mechanism, said structure including an arm pivoted to swing relative to said truck about an axis at right angles to the longitudinal axis of said truck and on the outer extremity of which said cutter bar support is pivotally mounted, said arm and bar support being swingable about parallel axes to move said cutter bar into parallel planes, motor operated devices for swinging said arm about its pivot, and separate motor operated devices icr swinging said cutter bar support about its pivot relative to said arm.

36. In a mining apparatus, a wheel truck, kerf cutting mechanism including a cutter bar support and a cutter bar on said support, and an adjustable supporting structure revolubly mounted on said truck about a longitudinal axis and extending between said truck and said cutting mechanism, said structure including an arm pivoted to swing relative to said truck about an axis at right angles to the longitudinal axis of said truck and on the outer extremity of which said cutter bar support is pivotally mounted, said arm and bar support being swingable about parallel axes to move said cutter bar into parallel planes, motor operated devices for swinging said arm about its pivot, and separate motor operated devices for swinging said cutter bar support about its pivot relative to said arm, said devices for swinging said cutter bar support being operable independently of said arm swinging devices.

37. In a mining apparatus, a support, kerf cutting mechanism including a cutter bar, an adjustable supporting means between said support and said cutting mechanism including a supporting structure pivotally mounted on said support to swing in longitudinal planes relative thereto, a cutter bar support pivotally mounted on the outer extremity of said supporting structure for swinging movement about an axis parallel to the supporting structure axis, said cutter bar being pivotally mounted on said bar support about an axis at right angles to a line parallel to a line parallel to the pivotal axis of said bar support, motor operated devices for swinging said supporting structure about its axis relative to said support, and separate motor operated devices ior swinging said cutter bar support relative to said supporting structure while the latter remains stationary,

38. In a mining apparatus, a support, a frame member mounted on said support for rotation relative thereto about a longitudinal axis, kerf cutting mechanism including a cutter bar, an adjustable supporting means between said rotatable frame member and said cutting mechanism including a supporting structure pivotally mounted on said frame member to swing relative thereto about an axis at right angles to the frame member axis, a cutter bar support pivotally mounted on the outer extremity of said supporting structure for swinging movement relative thereto about an axis parallel to the supporting structure axis, said cutter bar being pivotally mounted on said bar support about an axis at right angles to a line parallel to a line parallel to the pivotal axis or said bar support, motor operated devices for swinging said supporting structure about its axis relative to said support, and separate motor operated devices for swinging said cutter bar support relative to said supporting structure while the latter remains stationary.

39. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a longitudinal axis, kerf cutting mechanism including a cutter bar and a cutter bar support on which said cutter bar is pivotally mounted to swing relative thereto, a single rigid arm pivotally mounted on said rotatable support to swing relative thereto about an axis transverse to the support axis and extending forwardly in advance of said base and on the outer extremity of which said cutter bar support is pivotally mounted for swinging movement about an axis parallel to the axis of swinging movement of said arm, said arm constituting the sole supporting connection between said rotatable support and said bar support, and mechanism for swinging said arm and cutter bar support about their respective axes.

40. In a mining apparatus, a portable base, kerf cutting mechanism mounted on said base and including a cutter bar support and a cutter bar on said support, an adjustable supporting structure intervening said base and said cutting atedfdevices for. swinging said arm about its pivot relative to .said basaand Aseparate motor .operated devices for swingingsaid bar support about its pivot ,relative to said arm.

el. `lin la,,ruining` apparatus, a portable base, kerf `'cutting,lmechanism. mounted on said base and includingia cutter rbar support .and a cutter bar ,onfsaid support, anadjustablef .supporting structure intervening said base and `said `cutting mechanismincludingan elongated arm extending forwardly lengthwise lof the apparatusand in advance ofisaid base, said arm. being pivotally cpanel/ated"` to said` base and lon the outer extremity of which said .cutter vbar support is pivoltally `fr'nountefd,"said` arm and` .supportbeing "swingable `in longitudinal planes about parallel arresto move thelcutter bar into parallel planes, motor operated devices for swinging said arm aboutwits pivot relative to,y said base, and separate motor operated devices for swinging said bar support .about its pivot relative to said arm, said devices :forswinging said cutter bar support rel-` ative to,,sa'id` arm` being operable `independently ofsaid arm swinging devices. l

a2; `In .a mining apparatus, a portable! base, an arm pivotally amounted onfthe4 forward end` :of said base andlfextending forwardly lengthwise of the apparatus and in advance of saidbase, a cutter bar supportpivotally mounted on the Vouter extiemitylof said arm and'having a cutterlbar pivotally L[mounted ,thereon to swing relative tlieretO,4 Said armQand `support being. swingable in longitudinal planes about parallel axes to move said cutter bar into parallel `cutting positions,

motor operated `devices for swingingsaid arm about." its `pivotrelativeto said base, and `motor operated devices for swingingsaid cutter suppor r, the apparatus andin advanceof said' base, va

cutter bar.; support pivotally ,mounted on the outer extremity of said arm and having acutter `bar pivotally mounted thereon to swing relative thereto,` said arm and support being swingable I' in longitudinal' planes about parallel axes to move said cutter bar into parallel` cutting positions, motor, operated devices for swinging said arm about, itspivot relative to said base,`and motor operated devices for swinging said cutter `bar support about itsrpivet` relative to said arm,' lsaid devicesbeirig operable sirnuitaneouslyl 'tov swing said armand` cutter bar support in opposite direlationsv to maintain the cutter bar at all ltimes parallelto `a commonstraight line.

' lfllplrl a miningl apparatus, a portable base, a

lframemounted on said base and overhangingcthe orward endof said base, a single rigid .elongated arm,v pivotally` mounted on said overhanging frame andextending orwardlylongitudinally of the apparatus and in advance of the base, cut-` ting mechanism including afswingable `cutter bar pivotally4 mounted on the outereXt-remity" of said arm, said being pivotallyrnounted on said base `to `swing relative` thereto `in longitudinally eatending planes to movesaid .cutter bar,

`on adjustment Vof said cutting `mechanim, into parallel planes, said arm constituting the sole supporting connection between said base and said cutting mechanism, and mechanism for swinging` said arm relative to said base andfor swinging said cutting mechanism about its pivot relasaid support, and an adjustable supporting structure intervening said base and said cutting mechanism including an arm pivotally connected to said overhanging Aframe and on the outer extremity of which saidcurtter` bar support is pivotally `mounted,` said arm and support being swingable about parallelaxes spaced, longitudinally of the apparatus, a" substantial distance apart to move the cutter bar into parallel planes, motor `operated devices for swinging `said, arm about its pivot'relative to said base, and separate motor operated devices for swinging said bar support about its pivot relative to said arm.

`46. In a lmining apparatus, a portable base, a frame mounted onsaid base, said frame overhanging the vforward end of said base,l:erf cutting` mechanism mounted on said base and including a cutter bar support and a cutter bar on said support, and `an adjustable supporting structure intervening said base and said cutting mechanism including an arm pivotally connected to said overhanging frame and on the outer extremity of which said cutter bar support is pivotally mounted, said arm and support being 'swingable about parallel axes spaced, longitudinally of the apparatus, a substantial distance apart to move the cutter bar into parallel planes, motor operated devices for swinging said arm aboutits pivot relative to said base, and separate motor operated devices for swinging said bar support about its pivot relativefto said arm, said devices for swinging said cutter bar support relative `to said arm being` operable independently of said arm swinging devices. l

47., In a mining apparatus, a portable base, a frame mounted on said base, said frame overhanging the forward end ,of said base, an elongated arm mounted on said overlianging frame and extending forwardly lengthwise of the apparatus and in advance of said base, a cutter bar support pivotally mounted on the outerextremity of said arm and "having a cutter `bar pivotally mounted thereon to swing relative thereto, said arm and bar support being .swingable about parallel axes spaced, longitudinally of the apparatus, a substantial distance apart to move said tudinal planes relative to said base to move said cutter bar for adjustment into parallel cutting positions, a fcutterbar support mounted on the outer extremity of said arm, a cutter bar pivotally mounted on said support to swing relative thereto, and motor operated devices for independently swinging said arm relative to said rotatable support andV for swinging said cutter bar support relative to said arm, and motor operated devices for rotating said rotatable support relative to said base.

e9. In a mining apparatus, a portable base, an elongated arm structure pivotally mounted on said base to swing in longitudinal planes relative thereto, a cutter bar support pivotally mounted on the outer extremity of said arm structure, a cutter bar pivotally mounted on said bar support to swing relative thereto, and motor operated devices for swinging said arm structure about its pivot and for swinging said cutter bar support relative to said arm structure to move said cutter bar into parallel cutting positions, said cutter bar support being swingable relative to said arm structure while the latter remains stationary.

50. In a mining apparatus, a portable base, an elongated arm structure pivotally mounted on said base to swing in longitudinal planes relative thereto, a motor mounted on said base and relative to which said arm structure is swingable, a cutter bar support pivotally mounted on the outer extremity of said arm structure, acutter bar pivotally mounted on said bar support to swing relative thereto, and devices driven by said motor for swinging said arm structure relative to said base and said bar support relative to said arm structure to move said cutter bar into parallel cutting positions, said bar support being swingable relative to said arm structure while the latter remains stationary.

5l. In a mining apparatus, a portable base, an elongated arm structure pivotally mounted on said base to swing in longitudinal planes relative thereto, a motor mounted on said base and relative to which said arm structure is swingable, a cutter bar support pivotally mounted on the outer extremity of said arm structure, a cutter bar pivotally mounted on said bar support to swing relative thereto, devices driven by said motor for swinging said arm structure relative to said base and said bar support relative to said arm structure to move said cutter bar into parallel cutting positions, said bar support being swingable relative to said arm structure while the latter remains stationary, and devices driven by said motor for swinging said cutter bar about its pivot. relative to said bar support.

52. In a mining apparatus, a portable base, a support carrying a kerf cutter and an adjustable supporting structure intervening said base and kerf cutter support comprising but a single arm hinged to the forward end of the base to swing about an axis at right angles to the longitudinal axis of the base and on which said kerf cutter support is pivotally mounted, said arm constituting the sole supporting connection between said kerf cutter support and said base, and mechanisrn for adjusting said supporting structure and kerf cutter support to position said kerf cutter into parallel planes, said adjusting mechanism including means for swinging said arm and support about their pivots to move said kerf cutter into aforesaid parallel planes.

53. In a mining apparatus, a portable base, a support carrying a kerf cutter and an adjustable supporting structure intervening said base and kerf cutter support comprising but a single arm hinged to the forward end of the base to swing about an axis at right angles to the longitudinal axis of the base and on which said kerf cutter support is pivotally mounted, said arm constituting the sole supporting connection between said kerf cutter support and said base, and mechanism for adjusting said supporting structure and kerf cutter support to position said kerf cutter into parallel planes including planes adjacent the mine loor and parallel planes a substantial distance above the top of said base, said adjusting mechanism including means for swinging said arm and support about their pivots to move said kerf cutter into aforesaid parallel planes.

54. In a mining apparatus, a portable base, a single rigid arm pivotally mounted on said base to swing in a vertical direction relative thereto about an axis extending transversely of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the .arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support, and means for swinging said arm relative to said base and said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes above and below said base while the kerf cutter at all times remains in a horizontal cutting position.

55. In a mining apparatus, a portable base, a single rigid arm pivotally mounted on said base to swing in a vertical direction relativev thereto about an axis extending transversely of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support, and means for swinging said arm relative to said base and said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes adjacent the mine floor and horizontal planes a substantial distance above the top of said base while the kerf cutter at all times remains in a horizontal cutting position.

56. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about an axis extending transversely of said base, said arm extending longitudinally of said base a substantial distance in advance of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, said cutter support being swingable through at least 90 relative to said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm and support about their respective axes.

5'7. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about an axis extending transversely of said base, said arm extending longitudinally of said base a substantial distance in advance of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, said cutter support being swingable through substantially 180 relative to said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm and support about their respective axes.

58. In a mining apparatus, a portable base, a support mounted on said base for rotation about a longitudinal axis, an arm structure pivotally mounted on said rotatable support to swing relative thereto about an axis transverse to the supdriven shaft extending lengthwise of and vjournaled on said arm, an element coaxial with the cutter support pivot and driven by said shaft and a shaft journaled on said cutter support and driven by said coaxial element and operatively connected to the kerf cutter, and devices driven by said coaxial element for swinging said kerf cutter about its pivot.

68. In a Imining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel to the swinging axis of said arm, a kerf cutter pivotally mountedon said cutter support to swing relative thereto, motor operated devices for actuating said kerf cutter including a motor driven shaft journaled on said arm, and motor operated devices for swinging said kerf cutter relative to said cutter support including a worm gear coaxial with the cutter pivot and connectible to the cutter, and a worm meshing with said worm gear and driven by said shaft.

69. In a. mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the axis of swinging movement of said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, a motor on said base, devices actuated by said motor for actuating the kerf cutter including a shaft driven by said motor and journaled on said base, a transmission element coaxial with the arm pivot and driven by said shaft, a shaft extending lengthwise of and journaled on said arm and driven by said coaxial element, an element coaxial with the cutter support pivot and driven by said last mentioned shaft, a shaft journaled on the cutter support and driven by said last mentioned coaxial element and operatively connected to the kerf cutter, and devices driven by said shaft journaled on said arm for swinging said arm about its pivot.

70. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with theV axis of swinging movement of said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, a motor on said base, devices actuated by said motor for actuating the kerf cutter including a shaft driven by said motor and journaled on said base, a transmission element coaxial with the arm pivot and driven by said shaft, a shaft extending lengthwise of and journaled on said arm and driven by said coaxial element, an element coaxial with the cutter support pivot and driven by said last mentioned shaft, a. shaft journaled on the cutter support and driven by said last mentioned coaxial element and operatively connected to the kerf cutter, and devices driven by said shaft journaled on said arm for swinging lsaid cutter support about its pivot relative to said arm.

`r7l. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the axis of swinging movement of said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, a motor on said base, devices actuated by said motor for actuating the kerf cutter including a shaft driven by said motor and j ournaled on said base, a transmission element coaxial with the arm pivot and driven by said shaft, a shaft extending lengthwise of and journaled on said arm and driven by said coaxial element, an element coaxial with the cutter support pivot and driven by said last mentioned shaft, a shaft journaled on the cutter support and driven by said last mentioned coaxial element and operatively connected to the kerf cutter, and devices driven by said shaft journaled on said arm for swinging said cutter support and said arm about their respective pivots.

72. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the axis of swinging movement of said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto,'a motor on said base, devices actuated by said motor for actuating the kerf cutter including a shaft driven by said motor and journaled on said base, a transmission element coaxial with the arm pivot and driven by said shaft, a shaft extending lengthwise of and journaled on said arm and driven by said coaxial element, an element coaxial with the cutter support pivot and driven by said last mentioned shaft, a shaft journaled on the cutter support and driven by said last mentioned coaxial element and operatively connected to the kerf cutter, devices driven by said shaft journaled on said arm for swinging said arm about its pivot, and devices driven by said shaft journaled on said arm for -swinging said kerf cutter about its pivot relative to said cutter support.

73. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the axis of swinging movement of said arm, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, a motor on said base, devices actuated by said motor for actuating the kerf cutter including a shaft driven by said motor and journaled on said base, a transmission element coaxial with the arm pivot and driven by said shaft, a shaft extending lengthwise of and journaled on said arm and driven by said coaxial element, an element coaxial With the cutter support pivot and driven by said last mentioned shaft, a shaft journaled on the cutter support and driven byV said last mentioned coaxial element an-d operatively connected to the kerf cutter, devices driven by said shaft journaled on said arm for swinging said cutter support about its pivot relative to said arm, and devices driven by said shaft journaled on said arm for swinging said kerf cutter about its pivot relative to said cutter support.

'74. In a mining apparatus, a portable base, a kerf cutter swingable relative to said base to cut a vertical kerf, and adjustable supporting means on said base for supporting said kerf cutter and adjustable to move said kerf cutter into parallel vertical cutting positions between the sides of said base and including a plurality of relatively adjustable supports, one mounted on the other t asomar and rotatable reiativeto the base about paranei rertical axes and motor operated devices for independently rotating -saidsupports about their respective axes, eitherY supportl swingable i relative tothe otherwhile. the latter remains stationary as regards swinging movement about its own axis and said support mounted on the other support being movable upon rotation of the other support relative to the. base bodily relative to the base `to positionstfrom one` side of the. baseto the otherdk '15. In a mining apparatus,` a portable base, an armpivotally mounted at 'its rear end on said base` to swing in a vertical direction relative thered to about a horizontal axis. extending transverse-v Iy or said base,.a cutter support pivotally mounted j onthe vforward Vend oi"` said arm to swing rela-.`

tive thereto about an axis parallel with the arm pivot axis, a horizontal lrerf cutter pivotally l mounted on said cutter support to swing relative truck thereto, and means for swinging said arm rela- `tivetosaidbaseand said cutter support relative to said'arm to move said korf cutter into parallel horizontal planes including horizontal planes above and below said base while the kerf cutter at all timesremains in a horizontal cutting position,` said cutter support being swingable, through aV relatively wide `range about its pivot relative to said arm while the latter remains stationary, into cutting positions at substantial angles at opposite sides of a horizontal plane including the support axis.

'76. In a mining apparatus, a portable base, an arm pivotally mounted at `its rear end on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, a cutter -support pivotally mounted on the front end of said `arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf' cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm relative to said base and said cutter support relativeto said arm to move said Alrerf` cutter into parallel horizontal planes including horizontal planes adjacent the mine hoor and horizontal planes a substantial l distance above the top of said base while the kerf cutter at all times remains in a horizontal cutting position, said cutter support being swing` able, through a relatively wide range about its pivot `relative tosaid arm while the latterreeA mains stationary, into' cuttingpositionsat substantial angles at opposite sidesof a horizontal plane including the support axis." l 1 '77. In a mining apparatus, a `wheeled:truck adapted to run alongfa mine trackway, an arm `pivotally mounted on theforward endv of said towswing in a vertical direction relative thereto about a horizontal axis 'extending transversely of the apparatus in advanceof" the front truck wheel axes, a cutter support pivotally mounted on the` outer extremity of .said arm, a horizontal keri cutter carried bysaid 'cuttersupport, and motor operated means for swinging said armandcutter support Vabout their respective l axes to movefthe keri cutter into parallel horie zontal planes includinglhorizontal planesY above and below said truck, said cutter support being swingable by said motor operated means-through a relatively` wide range relative to saida-rm while the latter remainsstationary. i '7"8. In a mining apparatus", a wheeledtruck adapted torun along a mine trackway, an arm pivotally` mounted on" the forwardjend ol said truck to swing. in avertical direction relative thereto about ahori'zontal" axis extending1v transversely of the apparatus in advance of the front truck wheel axes, a cutter support l pivotally mountedlon the outer extremity of said arm, a horizontal lrerf` cutter carried by said cutter support, and motor operated means for swinging Aarm pivotally mounted on said base to swing in a vertical direction in longitudinal planes relative thereto, a cutter support pivotally mounted on the outerextremity of said arm to swing rela- A tive thereto about an axis parallel with the arm pivot `axisa, kerf cutter pivotallymounted on said cutter support to swing relative thereto,4 and a motor on said base and relative to which said arm is swingable for swinging said arm relative towsaid base, for swinging said cutter support relative to said arm and for actuating said kerf cutter, said cutter support being ,swingable by saidmotor through a relatively wide range relative to said arm while the latter remains stationary. i I

' 80. `In a mining apparatus, a portablelbasa, an arm pivotally mounted on said base to swing in a vertical direction relative` thereto about a horizontal axis extending transversely of saidbase, a cutter support pivotally mounted on the outer extremity ol' said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm through' at least. about its axis. relative to said base and saidcutter support relative to said arm to move saidiker cutter into parallel horizontal planes including horizontal planes above and belowr said base while the leert` cutter at all `tirnes remains in a horizontal cutting position. i ,l

331i In a mining apparatus, a portable base, an arm'pivotally mounted on'said base to swing in a vertical direction relative thereto about a horizontal axis extending. transversely of said base, a cutter support pivotally mounted on the outer extremity ofsaid arm to swing relative thereto about an axis parallel withthe arm pivot axis, a' horizontal -kerf cutter pivotally mounted on said' cutter support `to swing relative thereto, and means 4for swinging said arm through substantially 90about its axis relativetosaid base and said cutter support relative to said arm to move said kerf' cutter intov parallel`horizontal planes including horizontal planes above and below said base whilel the keri" cutter at all times remains in a horizontal'cutting position.4

872. In a mining apparatus, aportable base, an arin'pivotally mounted on said base toswing in avverticaldirection relative thereto about a horil zontal axis extending transversely of said3base, aicutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about axis parallel with the arm pivot axis, allioriz'ontalkerf cutter pivotally mounted `on said cutter support to swing relative thereto, and riri'eans,` 'for Jswinging said arrn through atleast 45 about-'its axis relative to said base and said cutter support relative to" said arm tol move said kerfcut'ter intoy parallel horizontal planesj in` cluding horizontal planes above and below said base while the kerf cutter at all times remains in a horizontal cutting position, said cutter support being swingable through at least about its axis relative to said arm.

83. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm through Asubstantially 90 about its axis relative to said base and said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes above and below said base while the kerf cutter at all times remains in a horizontal cutting position, said cutter support being swingable through substantially 90 about its axis relative to said arm.

84. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm through at least 45 about its axis relative to said base and said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes adjacent the mine iloor and horizontal planes a substantial distance above the top of said base while the kerf cutter at all times remains in a horizontal cutting position.

85. In'a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, a cutter support pivotally mounted on the-outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm through substantially 90 about its axis relative to said base and said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes adjacent the mine iioor and horizontal planes a vsubstantial distance above the top of said base while the kerf cutter at all times remains in a horizontal cutting position.

86. In a mining apparatus,` a portable'base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm through at least 45 about its axis relative to said base and.' said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes adjacent the mine floor and horizontal planes a substantial distance above the top of said base while the kerf cutter at all times remains in a horizontal cutting position, said cutter support being swingable through substantially 90 about its axis relative to said arm.

87. In a mining apparatus, a portable base,

an arm pivotally mounted on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, a cutter support pivotally mounted on the outer extremity of said arm to swing relative thereto about an axis parallel with the arm pivot axis, a horizontal kerf cutter pivotally mounted on said cutter support to swing relative thereto, and means for swinging said arm through substantially 90 about its axis relative to said base and said cutter support relative to said arm to move said kerf cutter into parallel horizontal planes including horizontal planes adjacent the mine oor and horizontal planes a substantial distance above the top of said base while the kerf cutter at all times remains in a horizontal cutting position, said cutter support being swingable through substantially 90 about its axis relative to said arm.

. 88. In a coal mining machine, a chassis, a rotatable head on one end thereof having a projecting supporting bracket with a segmental gear thereon, a link pivoted on said bracket, gearing on said link engageable with said segmental gearing, a cutter support, mounted on the free link end and pivoted thereon, said cutter support having a similar segmental gear xed thereon for changing the angular position of the cutter support with respect to said link.

89. In a coal mining machine, in combination with a chassis and a cutter bar having cutting means thereon, means on the chassis for operating the cutting means, and a connecting means between the chassis and the cutter bar, said connecting means comprising a link having a plurality of worms connected with a suitable part of the chassis for elevating the cutter bar, a plurality of worms connected with a suitable part of the cutter bar to elevate the cutter bar, and a common drive means for said worms.

90. In a mining apparatus, a portable base, an arm structure comprising but a single rigid arm pivotally mounted on said base to swing in a vertical direction relative thereto about a horizontal axis extending transversely of said base, said arm extending lengthwise of said base, a cutter support pivotally mounted on the outer extremity of said arm structure to swing through a relatively wide range relative thereto about an axis parallel with the arm structure axis while said arm remains stationary as regards vertical swinging movement, and a kerf cutter pivotally mounted on said cutter support to swing relative thereto, said support being swingable relative to said arm to move the kerf cutter into cutting positions at substantial angles at opposite sides of a plane including the support axis.

91. In a mining apparatus, a portable base, an arm pivotally mounted on said base to swing in a vertical direction relative thereto about a transverse axis and extending lengthwise of said base,

a cutter support pivotally mounted on the outer extremity of said arm to swing through a relatively wide range relative thereto about an axis parallel with the arm axis, a kerf cutter pivotally mounted on said cutter support to swing relative thereto, said cutter support being swingable relative to said arm to move the kerf cutter into cutting positions at substantial angles at opposite sides of a plane including the support axis, and motor driven means for actuating said kerf cutter aoorzbor including a shaft journaled on said." arm, and means drivenby said shaft for swinging said cutter support about its pivot.

92. In a coal mining machine; a chassis, a rotatable head mounted thereon for'supporting a coal cutter, a coal cutter, a support therefor pivotable onavertical axis, a link pivotally connecting said support for the cutter to said rotatable head, gearing on said cutter supportand rotatable head respectively, gearing on said link engaging therewith, land` means `for alternately driving said gearing `to change the elevation and angular position of said cutter while said rotatable head remains stationary.

93. In a coal mining machine, a chassis, a rotatable head mounted thereon ior sup-porting a coal cutter, a coal cutter, a support therefor pivoted on a vertical axis, a link pivotally connecting said support for the cutter to said rotatable head, gearing on said cutter support and rotatable head respectively, gearing on said link engaging therei i with, means for alternately driving said gearing to change the elevation and angular position of said cutter while said rotatable headiremains stationary, and means on said cutter support for rotating said cutter about its vertical axis.

94. Ina coal mining machine, `in combination with a chassis and a cutter bar, a support for supporting the cutter bar, means for connecting the support to the chassis, and means on the chassis for operating the cutter bar, said rst means comprising a link structure having thereon means cooperating with the chassis for elevating the support and the cutter bar by swinging in planes extending longitudinally of the machine between the sides thereof.

95. In a coal mining machine, in combination with a chassis and a cutter bar, a support for supporting the cutter bar, means for connecting the support to the chassis, and means on the chassis for operating the cutter bar, `said rst means comprising a link structurehaving thereon means cooperating with the chassis ior elevating the support and the cutter bar by swinging in planes extending longitudinally of the machine between the sides thereof, and means for tilting the cutter bar.

96.` In a coal mining machine, in combination with a chassis and a cutter bar, a support for supporting the cutter bar, means for connecting the support to the chassis, cutter means on the cutter bar and means on the chassis for operating said cutting means, said connecting means comprising means cooperating with the chassis for swingingly elevating the support and the cutter bar, means cooperating with the cutter bar to further swingingly elevate the cutter bar by continued movement in the same planes, and means to operate both the said last named means independently or ccnjunctively.

97. In a coal mining machine, in combination with a chassis and a cutter bar having cutting means thereon, means on the chassis for operating the cutting means, and a connecting means between the chassis and the cutter bar, said connecting means comprising a link having a plurality of worms connected with a suitablepart of the chassis for" elevating the cutter bar, a plurality of worms connected with a suitable part oi the cutter bar to elevate the cutter bar, a common drive means for said worms, and means for selectively connecting said `drive to said worms.

98. In a coal mining machine, in combination with a chassis and a cutter bar, means for connecting the chassis tothe cutter bar comprising a link structure having thereon a plurality of worms operatively connected to some part of the chassis, a second pairv of worms Voperatively connected to somepart of the cutter barba motor, and ia clutch Vconnection between each pairi` or worms andthe motor. i

99. In a coal mining machine, in combination with a chassis having thereon a rotating `.head and a cutter Vsupport having thereon a `cutter bar, means connecting the rotating head to the cutter support comprising a link structure pivotally connected to each and having thereon a gear mechanism operatively connected to the rotating head for elevating the link structure, a second gear mechanism operatively connected to the cutter support for elevating the cutter bar, power means located on said connecting means, and means ior` connecting said power means to either of said gear mechanism.

ViGO. In a coal mining machine, in combination with a chassis and a cutter bar, a connection between said chassis and said cutter bar comprising a link structure having a pivotal connection at` each end thereof and having thereon means cooperating with the chassis for elevating the cutter bar, a second means thereon cooperating with the cutter bar for elevating the cutter bar, a motor for operatingboth of said means, and means for controlling the operation of said motor to cause the operation of said rst-named means or to cut out the motor and stop the operation thereof.

y 101. In a coal mining machine, a chassis, means for transporting the chassis, a rotatable supporting head on the chassis rotatable on a horizontal axis, means on the chassis for rotating the head, a rotatable support supported by the supporting head and rotatable relative thereto, a cutter carried by the rotatable support and pivotable relative thereto, means on the chassis for driving the cutter irrespective of the rotative position `of the supporting head, and power means on the rotatable support supported adjal cent the cutter to rotate the cutter about an axis on said rotatable support relative to the" latter. i

102. In combination, a chassis, a longitudinally `extending rotatable head thereon, a rotatable support carried by said rotatable head and rotatable relative to the latter, a cutter mounted on said rotatable support, means to rotate said cutter about a vertical axis to different positions with respect to the rotatable support and to drive said cutter irrespective of its position,

`port is pivotally mounted, said arm and `support being swingable about axes arranged at angles to the longitudinal axis oi the apparatus to move the cutter `bar into parallel or other planes, motor-operated `devices for swinging said arm about its pivot relative to said truck, and separate motor-operated devices for swinging said bar support about its pivot relative to said arm.`

104. In a mining apparatus, a wheeled truck, an arm pivotally mounted on the forward end of said truck, kerf cutting mechanism supported at the forward end of said arm and including a forwardly projecting kerf cutter, and devices carried by said arm for swinging said arm about its pivot and said kerf cutting mechanism on said arm to adjust said cutter bar into different planes while said cutter bar is maintained parallel to 1o a horizontal plane or any other plane.

105. In a mining apparatus, a wheeled truck,

CHARLES F. OSGOOD. 

